Bryant, Jr., Wade L., and Goodbred, Steven L., 2008, The response of hydrophobic organics and potential toxicity in streams to urbanization of watersheds in six metropolitan areas of the United States: Environmental Monitoring and Assessment, 29 p. doi: 10.1007/s10661-008-0546-5 Available Online

Carpenter, Kurt and McGhee, Gordon, 2009, Organic Compounds in Clackamas River Water Used for Public Supply near Portland, Oregon, 2003-05: U.S. Geological Survey Fact Sheet 2009-3030, 6 p. Available Online

Carter, J., Lapham, W., and Zogorski, J., 2008, Occurrence of volatile organic compounds in aquifers of the United States: Journal of the American Water Resources Association, vol. 44, no. 2, p. 399-416. doi: 10.1111/j.1752-1688.2008.00170.x Available Online